METHOD FOR PRODUCING 1,2,3-PROPANETRICARBOXYLIC ACID PLATE CRYSTAL

Title:

METHOD FOR PRODUCING 1,2,3-PROPANETRICARBOXYLIC ACID PLATE CRYSTAL

Document Type and Number:

Japanese Patent JP2007291029

Kind Code:

A

Abstract:

To provide a method for producing high-purity 1,2,3-propanetricarboxylic acid plate crystals, excellent in filtering separation characteristic by crystallization treatment from 1,2,3-propanetricarboxylic acid-containing reaction water solution.

The method for producing 1,2,3-propanetricarboxylic acid plate crystals comprises cooling a water solution containing 45-60 wt.% 1,2,3-propanetricarboxylic acid from a temperature of ≥60°C to 30°C under stirring of 3,000-20,000 Reynolds number to crystallize 1,2,3-propanetricarboxylic acid.

More Like This:

WO/2002/098835	CRYSTALLIZATION METHOD FOR PRODUCTION OF PURIFIED AROMATIC DICARBOXYLIC ACIDS
JPH08268955	PRODUCTION OF CRYSTALLINE GLYCOLIC ACID

Inventors:

KIHARA YOSHIHIRO
OBITA MINAKO
TOKUHO EIJI
KITAGAWA YUKIO

Application Number:

JP2006122208A

Publication Date:

November 08, 2007

Filing Date:

April 26, 2006

Export Citation:

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Assignee:

NEW JAPAN CHEM CO LTD

International Classes:

C07C51/43; C07C51/353; C07C51/38; C07C55/22

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